package com.cloud.order.service;

import com.cloud.order.mapper.OrderMapper;
import com.cloud.order.model.OrderInfo;
import com.cloud.order.model.ProductInfo;
import jakarta.annotation.PostConstruct;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;

import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;

@Slf4j
@Service
public class OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private RestTemplate restTemplate;
    @Autowired
    private DiscoveryClient discoveryClient;

    private AtomicInteger count = new AtomicInteger(1);
    private  List<ServiceInstance> instances;

    @PostConstruct
    public void init(){
        instances = discoveryClient.getInstances("product-service");
    }

// public OrderInfo selectByOrderId(Integer orderId) {
//     OrderInfo orderInfo = orderMapper.selectById(orderId);
////     String url = "http://127.0.0.1:9090/product/"+orderInfo.getProductId();
//     List<ServiceInstance> instances = discoveryClient.getInstances("product-service");
//     String uri = instances.get(0).getUri().toString();
//     String url = uri+"/product/"+orderInfo.getProductId();
//     log.info("远程调用url:{}",url);
//     ProductInfo productInfo = restTemplate.getForObject(url,ProductInfo.class);
//     orderInfo.setProductInfo(productInfo);
//     return orderInfo;
// }
public OrderInfo selectByOrderId(Integer orderId) {
    OrderInfo orderInfo = orderMapper.selectById(orderId);
//     String url = "http://127.0.0.1:9090/product/"+orderInfo.getProductId();

    int index = count.getAndIncrement()%instances.size();
    String uri = instances.get(index).getUri().toString();
    String url = uri+"/product/"+orderInfo.getProductId();
    log.info("远程调用url:{}",url);
    ProductInfo productInfo = restTemplate.getForObject(url,ProductInfo.class);
    orderInfo.setProductInfo(productInfo);
    return orderInfo;
}
}
